Saw this ebay listing this am. Might be a good deal for someone.... was hoping it would be for me since I found a crack in my 201 head Saturday. Contacted the seller and it's definitely a 25" head. But it made me wonder... was "Spitfire" enough information that I should have known it was a 25"?

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All spitfire 6 cylinder heads are 25 inch,but not all 25 inch heads are Spitfire. Spitfire was a Chrysler automotive marketing moniker. Lots of 25 inch heads out there that don't dsay spitfire. It has been documented a couple of time that thusly labeled heads are not more performance oriented than non spitting versions.

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If your going to buy any 23" head for either the US 218 or 230 motor , I would look for a 57-59 Plymouth or Dodge Head. This head has an 8:1 compression ratio as stock. The casting number( and most likely the part number) is 1676337. You will have to have the temp sender hole drilled out and re-tapped for the earlier temp gauges. Also, if using an earlier block without the extra by-pass the later head gasket needs to be used. I felt the extra "Pop" in the motor immediately after installing the head on the 230 I had up till recently in my WC-12. Here is a photo of the head

If your going to buy any 23" head for either the US 218 or 230 motor , I would look for a 57-59 Plymouth or Dodge Head. This head has an 8:1 compression ratio as stock. The casting number( and most likely the part number) is 1676337. You will have to have the temp sender hole drilled out and re-tapped for the earlier temp gauges. Also, if using an earlier block without the extra by-pass the later head gasket needs to be used. I felt the extra "Pop" in the motor immediately after installing the head on the 230 I had up till recently in my WC-12. Here is a photo of the head

Good to know. Thanks. More CR is definitely not in my plans. Already raised it with piston for this build. The stock head ought to do fine once it's back, cleaned up and checked for warpage after the welding process.